Silica reinforced triblock copolymer gels

Theunissen, Elisabeth; Overbergh, N.; Reynaers, Harry; Antoun, Said; Jérôme, Robert; Mortensen, K.

doi:10.1016/j.polymer.2004.01.016

Cited by 20 publications

(15 citation statements)

References 56 publications

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“…The aim of this article is to determine the effect of MWCNTs on the rheological, thermal, mechanical and morphological properties of NCTPEGs from microphaseordered poly(styrene-b-(etheylene-co-butylene)-b-styrene (SEBS) dissolved in hydrocarbon oil properties. The results obtained here further add to the insight gleaned from previous experiment of triblock copolymer [8][9][10], which primarily focused on rheological and morphological properties of NCTPEGs. Hopefully, this work gives new advancement in the field of nanocomposite polymer gels with wider application.…”

Section: Introductionsupporting

confidence: 63%

“…Silva et al [7] have examined the rheological properties of intercalated nanocomposites based on a poly(styrene-b-isoprene) (SI) diblock copolymer and a dimethyl/dioctadecyl-substituted montmorillonite (silicate). The morphology and viscoelastic behavior of nanocomposite thermoplastic elastomer gels (NCTPEGs) modified by different silica nanoparticles [8], nanoclays and multiwalled carbon nanotubes [9], and nanographite [10] was recently reported.…”

Section: Introductionmentioning

confidence: 99%

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Dispersion of multiwalled carbon nanotubes in thermoplastic elastomer gels: Morphological, rheological, and electrical properties

2009

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An investigation was reported here with an aim to prepare nanocomposite thermoplastic elastomer gels by dissolving polystyrene-b-poly(ethylene/butylene)-b-polystyrene (SEBS) triblock copolymer in selective hydrocarbon oils with the presence of multiwalled carbon nanotubes (MWCNTs). The properties related to morphology, viscoelasticity, electrical and mechanical properties, and thermal stability were explored and discussed. Dynamic rheological measurements of the resultant nanocomposite thermoplastic elastomer gels (NCTPEGs) confirmed that addition of MWCNTs affects the linear viscoelastic properties in which dynamic storage and loss moduli increase to some extent. At a temperature between 308C and 408C below the gel point the NCTPEGs have dynamic storage modulus greater than loss modulus (G 0 and G 00 ), thereby indicating that at room temperature a physical network is still present despite the addition of MWCNTs. The morphological properties revealed that MWCNTs were dispersed and exfoliated within the swollen TPE. The incorporation of small quantity of MWCNTs improved the thermal stability and mechanical properties of NCTPEGs. POLYM. COMPOS.

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Section: Introductionsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Dispersion of multiwalled carbon nanotubes in thermoplastic elastomer gels: Morphological, rheological, and electrical properties

2009

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“…The X‐rays are scattered because of fluctuations of the electron density in the material. These fluctuations can be associated with phase separation (in copolymers46–48), crystallization,49–51 the presence of particles,31, 52–58 and different crosslinking densities,7, 12 among other things.…”

Section: Resultsmentioning

confidence: 99%

Partially pyrolyzed poly(dimethylsiloxane)‐based networks: Thermal characterization and evaluation of the gas permeability

José

Prado

Schiavon

et al. 2006

J Polym Sci B Polym Phys

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In this investigation, the preparation and characterization of partially pyrolyzed membranes based on poly(dimethylsiloxane) (PDMS) are described. These membranes were obtained by the crosslinking of silanol‐terminated PDMS with multifunctional nanoclusters derived from the reaction of pentaerythritoltriacrylate with 2‐aminoethyl‐3‐aminopropyltrimethoxysilane and the in situ polycondensation of tetraethylortosilicate, followed by the thermal treatment of the resulting membranes at different temperatures. The partially pyrolyzed membranes were characterized with infrared spectroscopy, thermogravimetry, elemental analyses, dynamic mechanical analysis, small‐angle X‐ray scattering, and scanning electron microscopy. The membranes exhibited improvements in the thermal stability and mechanical strength. Even with distinct compositions with respect to the Si/O and Si/C ratios, the flexibility of these materials was maintained. The flux rates of the gases through the membranes were measured for N2, H2, O2, CH4, and CO2, at 25 °C. The permeability of the membranes changed with increases in the pyrolysis and oxidation temperatures. These membranes could be described as PDMS chains separated by inorganic clusters. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 299–309, 2007.

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“…Unusual properties are induced by the physical presence of the nanoparticle and by the interaction of the polymer with the particle and the state of dispersion. The morphology and viscoelastic behavior of nanocomposite thermoplastic elastomer gels (NCTPEGs) modified by different silica nanoparticles [12] nanoclays and multiwalled carbon nanotubes [13] and nanographite [14][15] was recently reported.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and thermal properties of thermoplastic elastomer gels in the presence of nanographite

Paglicawan¹,

Kim²

2011

E-Polymers

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Abstract:In this work, the effect of different nanographite such as expandable graphite (EG) and exfoliated graphite nanoplatelets (xGnP) on the electrical and thermal properties of nanocomposite thermoplastic elastomer gels prepared from a poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) imbibed with an EBcompatible paraffin oil was investigated. The electrical properties have been studied as a function of variation of nanoparticles in the frequency range of 5 2 to 10 7 Hz. For all the nanoparticles studied, the dielectric constant increases as the volume content of the nanoparticles in the TPE gels increases. The increase in dielectric constant was fairly smooth with no clear dielectric singularity in the concentration range studied. However, the percolation threshold in the dielectric spectra was clearly seen. The incorporation of a small quantity of nanographite improved the thermal stability of the swollen midblock of TPEGS, since the particles dispersed in this region, thereby increasing the distinct region of oil degradation temperature but no improvement on SEBS matrix. The results showed that size, shape and agglomeration of the particles with high amount of oil in SEBS system played a role in the dielectric properties and thermal stability.

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Silica reinforced triblock copolymer gels

Cited by 20 publications

References 56 publications

Dispersion of multiwalled carbon nanotubes in thermoplastic elastomer gels: Morphological, rheological, and electrical properties

Dispersion of multiwalled carbon nanotubes in thermoplastic elastomer gels: Morphological, rheological, and electrical properties

Partially pyrolyzed poly(dimethylsiloxane)‐based networks: Thermal characterization and evaluation of the gas permeability

Dielectric and thermal properties of thermoplastic elastomer gels in the presence of nanographite

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